1 Jamie: {building a time machine} So where in time shall we go?2 Adam: The late Jurassic! I've always wanted to see an Allosaurus!3 {beat}4 Jamie: Our President is an Allosaurus.4 Adam: That doesn't count!

Adam is, of course, using the most versatile of all tools to build the delicate circuitry of the time machine: the hammer.

In optical lens system design, you go through a process of refining your initial rough designs to produce a closer match to the desired
optical performance. One of the main methods of doing this is called
hammer optimisation (third last paragraph on
that page - unfortunately this method is not of general enough application to merit a Wikipedia page).

One can just imagine precision optical engineers carefully adjusting their precisely aligned and polished lenses by the repeated application of hammers.